Overall Vibration Characteristics Calculation of a Fishery Administration Ship

Abstract

To avoid resonance, suppress the hull vibration and reduce the noise, vibration characteristics must be predicted during the process of design. The added water mass of the fishery administration ship is calculated for predicting accurately the vibration characteristics. The natural frequency of vertical and horizontal vibration are calculated by FEM method and empirical formula method. The natural vibration characteristics of the target ship under no-load and full-load condition are calculated respectively. The natural frequency of 1st vertical and horizontal vibration which calculated by FEM and calculated by the empirical formula are similar. The natural frequency of the no-load condition is lower than the full load condition.